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Message-ID: <7164bfde-3c43-495f-8e1f-83b998ff17e2@intel.com>
Date: Mon, 26 Aug 2024 13:16:37 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Seunghwan Baek <sh8267.baek@...sung.com>, linux-kernel@...r.kernel.org,
linux-mmc@...r.kernel.org, ulf.hansson@...aro.org, ritesh.list@...il.com,
quic_asutoshd@...cinc.com
Cc: grant.jung@...sung.com, jt77.jang@...sung.com, junwoo80.lee@...sung.com,
dh0421.hwang@...sung.com, jangsub.yi@...sung.com, sh043.lee@...sung.com,
cw9316.lee@...sung.com, wkon.kim@...sung.com, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] mmc : fix for check cqe halt.
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@...r.kernel.org
> Signed-off-by: Seunghwan Baek <sh8267.baek@...sung.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));
> }
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