Re: LKFT: arm x15: mmc1: cache flush error -110
From: Jon Hunter <jonathanh@nvidia.com>
Date: 2020-02-25 10:04:40
Also in:
linux-mmc, lkml
On 24/02/2020 11:16, Ulf Hansson wrote:
+ Adrian On Fri, 21 Feb 2020 at 20:44, Bitan Biswas [off-list ref] wrote:quoted
On 2/21/20 1:48 AM, Ulf Hansson wrote:quoted
External email: Use caution opening links or attachments On Thu, 20 Feb 2020 at 18:54, Naresh Kamboju [off-list ref] wrote:quoted
On Wed, 19 Feb 2020 at 21:54, Ulf Hansson [off-list ref] wrote:quoted
On Thu, 13 Feb 2020 at 16:43, Naresh Kamboju [off-list ref] wrote:quoted
Try to restore the value for the cache flush timeout, by updating the define MMC_CACHE_FLUSH_TIMEOUT_MS to 10 * 60 * 1000".I have increased the timeout to 10 minutes but it did not help. Same error found. [ 608.679353] mmc1: Card stuck being busy! mmc_poll_for_busy [ 608.684964] mmc1: cache flush error -110 [ 608.689005] blk_update_request: I/O error, dev mmcblk1, sector 4302400 op 0x1:(WRITE) flags 0x20800 phys_seg 1 prio class 0 OTOH, What best i could do for my own experiment to revert all three patches and now the reported error gone and device mount successfully [1]. List of patches reverted, mmc: core: Specify timeouts for BKOPS and CACHE_FLUSH for eMMC mmc: block: Use generic_cmd6_time when modifying INAND_CMD38_ARG_EXT_CSD mmc: core: Default to generic_cmd6_time as timeout in __mmc_switch()
Reverting all the above also fixes the problem for me.
quoted
I find that from the commit the changes in mmc_flush_cache below is the cause. ##@@ -961,7 +963,8 @@ int mmc_flush_cache(struct mmc_card *card) (card->ext_csd.cache_size > 0) && (card->ext_csd.cache_ctrl & 1)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_FLUSH_CACHE, 1, 0); + EXT_CSD_FLUSH_CACHE, 1, + MMC_CACHE_FLUSH_TIMEOUT_MS);
I no longer see the issue on reverting the above hunk as Bitan suggested but now I see the following (which is expected) ... WARNING KERN mmc1: unspecified timeout for CMD6 - use generic
quoted hunk ↗ jump to hunk
Just as a quick sanity test, please try the below patch, which restores the old cache flush timeout to 10min. However, as I indicated above, this seems to be a problem that needs to be fixed at in the host driver side. For the sdhci driver, there is a bit of a tricky logic around how to deal with timeouts in sdhci_send_command(). My best guess is that's where we should look more closely (and I am doing that). From: Ulf Hansson <redacted> Date: Mon, 24 Feb 2020 11:43:33 +0100 Subject: [PATCH] mmc: core: Restore busy timeout for eMMC cache flushing Signed-off-by: Ulf Hansson <redacted> --- drivers/mmc/core/mmc_ops.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index da425ee2d9bf..713e7dd6d028 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c@@ -21,7 +21,7 @@ #define MMC_OPS_TIMEOUT_MS (10 * 60 * 1000) /* 10min*/ #define MMC_BKOPS_TIMEOUT_MS (120 * 1000) /* 120s */ -#define MMC_CACHE_FLUSH_TIMEOUT_MS (30 * 1000) /* 30s */ +#define MMC_CACHE_FLUSH_TIMEOUT_MS (10 * 60 * 1000) /* 10min */
This does not fix the problem for me. Jon -- nvpublic