char: misc: Does not request module for miscdevice with dynamic minor

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[ Upstream commit 1ba0fb42aa ]

misc_open() may request module for miscdevice with dynamic minor, which
is meaningless since:

- The dynamic minor allocated is unknown in advance without registering
  miscdevice firstly.
- Macro MODULE_ALIAS_MISCDEV() is not applicable for dynamic minor.

Fix by only requesting module for miscdevice with fixed minor.

Acked-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Signed-off-by: Zijun Hu <zijun.hu@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250714-rfc_miscdev-v6-6-2ed949665bde@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Zijun Hu 2025-07-14 23:34:17 +08:00 • committed by Greg Kroah-Hartman

parent 72cd71ec60

commit 6f3dcc8090

1 changed files with 5 additions and 3 deletions

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drivers/char/misc.c

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