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gpib: cb7210: Fix region leak when request_irq fails

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When request_irq() fails, the region allocated by request_region()
is not released. Fix this by calling release_region() before returning.

  Smatch warning:
    drivers/gpib/cb7210/cb7210.c:1068 cb_isa_attach() warn: 'config->ibbase'
  from __request_region() not released on lines: 1064.

Fixes: 82e3508046 ("staging: gpib: cb7210 console messaging cleanup")
Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
Link: https://patch.msgid.link/20260503093036.283546-1-zenghongling@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hongling Zeng 2026-05-03 17:30:36 +08:00 committed by Greg Kroah-Hartman
parent c4faab452b
commit 5ad2849605
1 changed files with 1 additions and 0 deletions
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1
drivers/gpib/cb7210/cb7210.c
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@ -1062,6 +1062,7 @@ static int cb_isa_attach(struct gpib_board *board, const struct gpib_board_confi
// install interrupt handler
if (request_irq(config->ibirq, cb7210_interrupt, isr_flags, DRV_NAME, board)) {
dev_err(board->gpib_dev, "failed to obtain IRQ %d\n", config->ibirq);
release_region(nec7210_iobase(cb_priv), cb7210_iosize);
return -EBUSY;
}
cb_priv->irq = config->ibirq;