Re: [PATCH v1] ata: libata-eh: Add timeout table entry for STANDBY IMMEDIATE

[Niklas Cassel <cassel@kernel.org>]

On Fri, Aug 14, 2026 at 11:58:46AM +0800, Xingui Yang wrote:
> ATA_CMD_STANDBYNOW1 is not in the ata_eh_cmd_timeout_table and falls
> back to the 5s default (ATA_EH_CMD_DFL_TIMEOUT), which is too short
> for some drives to complete a STANDBY IMMEDIATE command issued from
> ata_dev_power_set_standby() via ata_exec_internal():
> 
>   ata1.00: qc timeout after 5000 msecs (cmd 0xe0)
>   ata1.00: STANDBY IMMEDIATE failed (err_mask=0x4)
> 
> Reuse the existing ata_eh_flush_timeouts for this command, as a drive
> entering standby may need to flush its internal cache, making the flush
> timeout a natural fit.
> 
> Signed-off-by: Xingui Yang <yangxingui@huawei.com>
> ---
>  drivers/ata/libata-eh.c | 2 ++
>  include/linux/libata.h  | 2 +-
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
> index 05df7ea6954a..8f9e12f460c3 100644
> --- a/drivers/ata/libata-eh.c
> +++ b/drivers/ata/libata-eh.c
> @@ -149,6 +149,8 @@ ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = {
>  	  .timeouts = ata_eh_flush_timeouts },
>  	{ .commands = CMDS(ATA_CMD_VERIFY),
>  	  .timeouts = ata_eh_reset_timeouts },
> +	{ .commands = CMDS(ATA_CMD_STANDBYNOW1),
> +	  .timeouts = ata_eh_flush_timeouts },
>  };
>  #undef CMDS
>  
> diff --git a/include/linux/libata.h b/include/linux/libata.h
> index 96e626d6a7ca..6c0d385b2cde 100644
> --- a/include/linux/libata.h
> +++ b/include/linux/libata.h
> @@ -425,7 +425,7 @@ enum {
>  	/* This should match the actual table size of
>  	 * ata_eh_cmd_timeout_table in libata-eh.c.
>  	 */
> -	ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 8,
> +	ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 9,
>  
>  	/* User visible DMA mask for DMA control. DO NOT renumber. */
>  	ATA_DMA_MASK_ATA	= (1 << 0),	/* DMA on ATA Disk */
> -- 
> 2.43.0
> 

This patch does not seem to be on top of latest Linus tree.

If you look at latest Linus tree, it already has:
1e024d2b41ee ("ata: libata-eh: Increase STANDBY IMMEDIATE timeout")

Which looks to solve the same problem as this patch.


Kind regards,
Niklas