From: Vishal Kulkarni vishal@chelsio.com
[ Upstream commit fc89cc358fb64e2429aeae0f37906126636507ec ]
Release resources when attaching to ULD fail. Otherwise, data mismatch is seen between LLD and ULD later on, which lead to kernel panic when accessing resources that should not even exist in the first place.
Fixes: 94cdb8bb993a ("cxgb4: Add support for dynamic allocation of resources for ULD") Signed-off-by: Shahjada Abul Husain shahjada@chelsio.com Signed-off-by: Vishal Kulkarni vishal@chelsio.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c | 29 ++++++++++++++----------- 1 file changed, 17 insertions(+), 12 deletions(-)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c @@ -673,10 +673,10 @@ static void uld_init(struct adapter *ada lld->write_cmpl_support = adap->params.write_cmpl_support; }
-static void uld_attach(struct adapter *adap, unsigned int uld) +static int uld_attach(struct adapter *adap, unsigned int uld) { - void *handle; struct cxgb4_lld_info lli; + void *handle;
uld_init(adap, &lli); uld_queue_init(adap, uld, &lli); @@ -686,7 +686,7 @@ static void uld_attach(struct adapter *a dev_warn(adap->pdev_dev, "could not attach to the %s driver, error %ld\n", adap->uld[uld].name, PTR_ERR(handle)); - return; + return PTR_ERR(handle); }
adap->uld[uld].handle = handle; @@ -694,23 +694,24 @@ static void uld_attach(struct adapter *a
if (adap->flags & FULL_INIT_DONE) adap->uld[uld].state_change(handle, CXGB4_STATE_UP); + + return 0; }
-/** - * cxgb4_register_uld - register an upper-layer driver - * @type: the ULD type - * @p: the ULD methods +/* cxgb4_register_uld - register an upper-layer driver + * @type: the ULD type + * @p: the ULD methods * - * Registers an upper-layer driver with this driver and notifies the ULD - * about any presently available devices that support its type. Returns - * %-EBUSY if a ULD of the same type is already registered. + * Registers an upper-layer driver with this driver and notifies the ULD + * about any presently available devices that support its type. Returns + * %-EBUSY if a ULD of the same type is already registered. */ int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p) { - int ret = 0; unsigned int adap_idx = 0; struct adapter *adap; + int ret = 0;
if (type >= CXGB4_ULD_MAX) return -EINVAL; @@ -744,12 +745,16 @@ int cxgb4_register_uld(enum cxgb4_uld ty if (ret) goto free_irq; adap->uld[type] = *p; - uld_attach(adap, type); + ret = uld_attach(adap, type); + if (ret) + goto free_txq; adap_idx++; } mutex_unlock(&uld_mutex); return 0;
+free_txq: + release_sge_txq_uld(adap, type); free_irq: if (adap->flags & FULL_INIT_DONE) quiesce_rx_uld(adap, type);