greybus-dev October 2017

greybus-dev@lists.linaro.org

9 participants
4 discussions

[PATCH v2] staging: greybus: Convert timers to use timer_setup()

by Kees Cook

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: "Bryan O'Donoghue" <pure.logic(a)nexus-software.ie> Cc: Johan Hovold <johan(a)kernel.org> Cc: Alex Elder <elder(a)kernel.org> Cc: greybus-dev(a)lists.linaro.org Cc: devel(a)driverdev.osuosl.org Signed-off-by: Kees Cook <keescook(a)chromium.org> --- v2: Added back "get" in timer code, thanks to Bryan. :) --- drivers/staging/greybus/loopback.c | 19 +++++++++---------- drivers/staging/greybus/operation.c | 7 +++---- 2 files changed, 12 insertions(+), 14 deletions(-) diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index 08e255884206..1c0bafeb7ea5 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -572,16 +572,16 @@ static void gb_loopback_async_operation_work(struct work_struct *work) gb_loopback_async_operation_put(op_async); } -static void gb_loopback_async_operation_timeout(unsigned long data) +static void gb_loopback_async_operation_timeout(struct timer_list *t) { - struct gb_loopback_async_operation *op_async; - u16 id = data; + struct gb_loopback_async_operation *op_async = + from_timer(op_async, t, timer); + unsigned long flags; + + spin_lock_irqsave(&gb_dev.lock, flags); + gb_loopback_async_operation_get(op_async); + spin_unlock_irqrestore(&gb_dev.lock, flags); - op_async = gb_loopback_operation_find(id); - if (!op_async) { - pr_err("operation %d not found - time out ?\n", id); - return; - } schedule_work(&op_async->work); } @@ -631,8 +631,7 @@ static int gb_loopback_async_operation(struct gb_loopback *gb, int type, if (ret) goto error; - setup_timer(&op_async->timer, gb_loopback_async_operation_timeout, - (unsigned long)operation->id); + timer_setup(&op_async->timer, gb_loopback_async_operation_timeout, 0); op_async->timer.expires = jiffies + gb->jiffy_timeout; add_timer(&op_async->timer); diff --git a/drivers/staging/greybus/operation.c b/drivers/staging/greybus/operation.c index 3023012808d9..ee4ba3f23bef 100644 --- a/drivers/staging/greybus/operation.c +++ b/drivers/staging/greybus/operation.c @@ -294,9 +294,9 @@ static void gb_operation_work(struct work_struct *work) gb_operation_put(operation); } -static void gb_operation_timeout(unsigned long arg) +static void gb_operation_timeout(struct timer_list *t) { - struct gb_operation *operation = (void *)arg; + struct gb_operation *operation = from_timer(operation, t, timer); if (gb_operation_result_set(operation, -ETIMEDOUT)) { /* @@ -541,8 +541,7 @@ gb_operation_create_common(struct gb_connection *connection, u8 type, goto err_request; } - setup_timer(&operation->timer, gb_operation_timeout, - (unsigned long)operation); + timer_setup(&operation->timer, gb_operation_timeout, 0); } operation->flags = op_flags; -- 2.7.4 -- Kees Cook Pixel Security

6 years, 5 months

[PATCH] staging: greybus: spilib: fix use-after-free after deregistration

by Johan Hovold

Remove erroneous spi_master_put() after controller deregistration which would access the already freed spi controller. Note that spi_unregister_master() drops our only controller reference. Fixes: ba3e67001b42 ("greybus: SPI: convert to a gpbridge driver") Cc: stable <stable(a)vger.kernel.org> # 4.9 Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/staging/greybus/spilib.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/staging/greybus/spilib.c b/drivers/staging/greybus/spilib.c index e97b19148497..1e7321a1404c 100644 --- a/drivers/staging/greybus/spilib.c +++ b/drivers/staging/greybus/spilib.c @@ -544,11 +544,14 @@ int gb_spilib_master_init(struct gb_connection *connection, struct device *dev, return 0; -exit_spi_unregister: - spi_unregister_master(master); exit_spi_put: spi_master_put(master); + return ret; + +exit_spi_unregister: + spi_unregister_master(master); + return ret; } EXPORT_SYMBOL_GPL(gb_spilib_master_init); @@ -558,7 +561,6 @@ void gb_spilib_master_exit(struct gb_connection *connection) struct spi_master *master = gb_connection_get_data(connection); spi_unregister_master(master); - spi_master_put(master); } EXPORT_SYMBOL_GPL(gb_spilib_master_exit); -- 2.14.3

6 years, 5 months

[PATCH] staging: greybus: Convert timers to use timer_setup()

by Kees Cook

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: "Bryan O'Donoghue" <pure.logic(a)nexus-software.ie> Cc: Johan Hovold <johan(a)kernel.org> Cc: Alex Elder <elder(a)kernel.org> Cc: greybus-dev(a)lists.linaro.org Cc: devel(a)driverdev.osuosl.org Signed-off-by: Kees Cook <keescook(a)chromium.org> --- drivers/staging/greybus/loopback.c | 14 ++++---------- drivers/staging/greybus/operation.c | 7 +++---- 2 files changed, 7 insertions(+), 14 deletions(-) diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index 08e255884206..045aaf81113a 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -572,16 +572,11 @@ static void gb_loopback_async_operation_work(struct work_struct *work) gb_loopback_async_operation_put(op_async); } -static void gb_loopback_async_operation_timeout(unsigned long data) +static void gb_loopback_async_operation_timeout(struct timer_list *t) { - struct gb_loopback_async_operation *op_async; - u16 id = data; + struct gb_loopback_async_operation *op_async = + from_timer(op_async, t, timer); - op_async = gb_loopback_operation_find(id); - if (!op_async) { - pr_err("operation %d not found - time out ?\n", id); - return; - } schedule_work(&op_async->work); } @@ -631,8 +626,7 @@ static int gb_loopback_async_operation(struct gb_loopback *gb, int type, if (ret) goto error; - setup_timer(&op_async->timer, gb_loopback_async_operation_timeout, - (unsigned long)operation->id); + timer_setup(&op_async->timer, gb_loopback_async_operation_timeout, 0); op_async->timer.expires = jiffies + gb->jiffy_timeout; add_timer(&op_async->timer); diff --git a/drivers/staging/greybus/operation.c b/drivers/staging/greybus/operation.c index 3023012808d9..ee4ba3f23bef 100644 --- a/drivers/staging/greybus/operation.c +++ b/drivers/staging/greybus/operation.c @@ -294,9 +294,9 @@ static void gb_operation_work(struct work_struct *work) gb_operation_put(operation); } -static void gb_operation_timeout(unsigned long arg) +static void gb_operation_timeout(struct timer_list *t) { - struct gb_operation *operation = (void *)arg; + struct gb_operation *operation = from_timer(operation, t, timer); if (gb_operation_result_set(operation, -ETIMEDOUT)) { /* @@ -541,8 +541,7 @@ gb_operation_create_common(struct gb_connection *connection, u8 type, goto err_request; } - setup_timer(&operation->timer, gb_operation_timeout, - (unsigned long)operation); + timer_setup(&operation->timer, gb_operation_timeout, 0); } operation->flags = op_flags; -- 2.7.4 -- Kees Cook Pixel Security

6 years, 5 months

[PATCH 2/3] greybus: audio: don't inclide rwlock.h directly.

by Sebastian Andrzej Siewior

rwlock.h should not be included directly. Instead linux/splinlock.h should be included. One thing it does is to break the RT build. Cc: Vaibhav Agarwal <vaibhav.sr(a)gmail.com> Cc: Mark Greer <mgreer(a)animalcreek.com> Cc: Johan Hovold <johan(a)kernel.org> Cc: Alex Elder <elder(a)kernel.org> Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: greybus-dev(a)lists.linaro.org Cc: devel(a)driverdev.osuosl.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> --- drivers/staging/greybus/audio_manager.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/audio_manager.c b/drivers/staging/greybus/audio_manager.c index aa6508b44fab..045696ce85c7 100644 --- a/drivers/staging/greybus/audio_manager.c +++ b/drivers/staging/greybus/audio_manager.c @@ -10,7 +10,7 @@ #include <linux/sysfs.h> #include <linux/module.h> #include <linux/init.h> -#include <linux/rwlock.h> +#include <linux/spinlock.h> #include <linux/idr.h> #include "audio_manager.h" -- 2.14.2

6 years, 6 months

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greybus-dev October 2017