On 26/08/24 12:17, Seunghwan Baek wrote:

The subject starts with "[Patch 2/2]" but is there another patch? Did you mean "[Patch v2] ..."?

To check if mmc cqe is in halt state, need to check set/clear of CQHCI_HALT bit. At this time, we need to check with &, not &&. Therefore, code to> check whether cqe is in halt state is modified to cqhci_halted, which has already been implemented.

Doesn't compile:

drivers/mmc/host/cqhci-core.c: In function ‘__cqhci_enable’: drivers/mmc/host/cqhci-core.c:285:13: error: implicit declaration of function ‘cqhci_halted’; did you mean ‘cqhci_writel’? [-Werror=implicit-function-declaration] 285 | if (cqhci_halted(cq_host)) | ^~~~~~~~~~~~ | cqhci_writel drivers/mmc/host/cqhci-core.c: At top level: drivers/mmc/host/cqhci-core.c:956:13: error: conflicting types for ‘cqhci_halted’; have ‘bool(struct cqhci_host *)’ {aka ‘_Bool(struct cqhci_host *)’} 956 | static bool cqhci_halted(struct cqhci_host *cq_host) | ^~~~~~~~~~~~ drivers/mmc/host/cqhci-core.c:285:13: note: previous implicit declaration of ‘cqhci_halted’ with type ‘int()’ 285 | if (cqhci_halted(cq_host)) | ^~~~~~~~~~~~ cc1: all warnings being treated as errors

Not only should it compile, but you must test it!

Probably better to make 2 patches: 1. Just the fix, cc stable i.e.

diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c index c14d7251d0bb..a02da26a1efd 100644 --- a/drivers/mmc/host/cqhci-core.c +++ b/drivers/mmc/host/cqhci-core.c @@ -617,7 +617,7 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq) cqhci_writel(cq_host, 0, CQHCI_CTL); mmc->cqe_on = true; pr_debug("%s: cqhci: CQE on\n", mmc_hostname(mmc)); - if (cqhci_readl(cq_host, CQHCI_CTL) && CQHCI_HALT) { + if (cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) { pr_err("%s: cqhci: CQE failed to exit halt state\n", mmc_hostname(mmc)); }

2. Tidy up, no cc stable

diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c index a02da26a1efd..178277d90c31 100644 --- a/drivers/mmc/host/cqhci-core.c +++ b/drivers/mmc/host/cqhci-core.c @@ -33,6 +33,11 @@ struct cqhci_slot { #define CQHCI_HOST_OTHER BIT(4) };

+static bool cqhci_halted(struct cqhci_host *cq_host) +{ + return cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT; +} + static inline u8 *get_desc(struct cqhci_host *cq_host, u8 tag) { return cq_host->desc_base + (tag * cq_host->slot_sz); @@ -282,7 +287,7 @@ static void __cqhci_enable(struct cqhci_host *cq_host)

cqhci_writel(cq_host, cqcfg, CQHCI_CFG);

- if (cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) + if (cqhci_halted(cq_host)) cqhci_writel(cq_host, 0, CQHCI_CTL);

mmc->cqe_on = true; @@ -617,7 +622,7 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq) cqhci_writel(cq_host, 0, CQHCI_CTL); mmc->cqe_on = true; pr_debug("%s: cqhci: CQE on\n", mmc_hostname(mmc)); - if (cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) { + if (cqhci_halted(cq_host)) { pr_err("%s: cqhci: CQE failed to exit halt state\n", mmc_hostname(mmc)); } @@ -953,11 +958,6 @@ static bool cqhci_clear_all_tasks(struct mmc_host *mmc, unsigned int timeout) return ret; }

-static bool cqhci_halted(struct cqhci_host *cq_host) -{ - return cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT; -} - static bool cqhci_halt(struct mmc_host *mmc, unsigned int timeout) { struct cqhci_host *cq_host = mmc->cqe_private;

Fixes: 0653300224a6 ("mmc: cqhci: rename cqhci.c to cqhci-core.c")

Fixes tag should be the commit that introduced the code, not one that moved it. In this case, it has been there since the beginning:

Fixes: a4080225f51d ("mmc: cqhci: support for command queue enabled host")

Looks like the offending code kinda worked which explains why it wasn't noticed sooner.

Cc: stable@vger.kernel.org Signed-off-by: Seunghwan Baek sh8267.baek@samsung.com

---

drivers/mmc/host/cqhci-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c index c14d7251d0bb..3d5bcb92c78e 100644 --- a/drivers/mmc/host/cqhci-core.c +++ b/drivers/mmc/host/cqhci-core.c @@ -282,7 +282,7 @@ static void __cqhci_enable(struct cqhci_host *cq_host) cqhci_writel(cq_host, cqcfg, CQHCI_CFG);

• if (cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT)

• if (cqhci_halted(cq_host)) cqhci_writel(cq_host, 0, CQHCI_CTL);

mmc->cqe_on = true; @@ -617,7 +617,7 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq) cqhci_writel(cq_host, 0, CQHCI_CTL); mmc->cqe_on = true; pr_debug("%s: cqhci: CQE on\n", mmc_hostname(mmc));

• if (cqhci_readl(cq_host, CQHCI_CTL) && CQHCI_HALT) {
  

• if (cqhci_halted(cq_host)) {
  pr_err("%s: cqhci: CQE failed to exit halt state\n",
         mmc_hostname(mmc));
  

  }