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staging: gpib: Change error code for no listener

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When doing a write a test is made to see whether there are any
listeners. The code was returning ENODEV which is incorrect.
The user library translates ENOTCONN to a user level no listener
error code.

Change the error code to ENOTCONN.

Fixes: 4cd654f847 ("staging: gpib: Add gpio bitbang GPIB driver")
Tested-by: Dave Penkler <dpenkler@gmail.com>
Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://lore.kernel.org/r/20250418173434.2892-7-dpenkler@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Penkler 2025-04-18 19:34:32 +02:00 committed by Greg Kroah-Hartman
parent 8da1ce7ec0
commit 427ab512c2
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/gpib/gpio/gpib_bitbang.c
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@ -516,7 +516,7 @@ static int bb_write(struct gpib_board *board, u8 *buffer, size_t length,
gpiod_get_value(NRFD), gpiod_get_value(NDAC));
if (gpiod_get_value(NRFD) && gpiod_get_value(NDAC)) { /* check for listener */
retval = -ENODEV;
retval = -ENOTCONN;
goto write_end;
}