lkml.org 
[lkml]   [2024]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] spi: Fix error code checking in spi_mem_exec_op()
From
On Wed Mar 13, 2024 at 6:10 PM CET, Florian Fainelli wrote:
> After commit cff49d58f57e ("spi: Unify error codes by replacing -ENOTSUPP with
> -EOPNOTSUPP"), our SPI NOR flashes would stop probing with the following
> visible in the kernel log:
>
> [ 2.196300] brcmstb_qspi f0440920.qspi: using bspi-mspi mode
> [ 2.210295] spi-nor: probe of spi1.0 failed with error -95
>
> It turns out that the check in spi_mem_exec_op() was changed to check
> for -ENOTSUPP (old error code) or -EOPNOTSUPP (new error code), but this
> means that for drivers that were converted, the second condition is now
> true, and we stop falling through like we used to. Fix the error to
> check for neither error being neither -ENOTSUPP *nor* -EOPNOTSUPP.
>
> Fixes: cff49d58f57e ("spi: Unify error codes by replacing -ENOTSUPP with -EOPNOTSUPP")
> Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
> Change-Id: I4159811f6c582c4de2143382473d2000b8755872

Ha, thank you!

Reviewed-by: Michael Walle <mwalle@kernel.org>

FWIW in next, there is commit
e63aef9c9121e ("spi: spi-mem: add statistics support to ->exec_op() calls")
that probably will conflict with this one.

Also, - not for this patch - but with that logic, spi_mem_exec_op()
might return EOPNOTSUPP *or* ENOTSUPP, even for drivers which might
still return ENOTSUPP, because there is one condition in
spi_mem_exec_op() which will always return EOPNOTSUPP. That is
somewhat confusing, no?

-michael

\
 
 \ /
  Last update: 2024-03-13 19:42    [W:0.066 / U:0.972 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site