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staging: gpib: Add missing mutex unlock in agilent usb driver

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When no matching product id was found in the attach function the driver
returned without unlocking the agilent_82357a_hotplug_lock mutex.

Add the unlock call.

This was detected by smatch:
smatch warnings:
drivers/staging/gpib/agilent_82357a/agilent_82357a.c:1381 agilent_82357a_attach() warn: inconsistent returns 'global &agilent_82357a_hotplug_lock'.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202412210143.WJhYzXfD-lkp@intel.com/
Fixes: 4c41fe886a ("staging: gpib: Add Agilent/Keysight 82357x USB GPIB driver")
Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://lore.kernel.org/r/20250111161457.27556-1-dpenkler@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Penkler 2025-01-11 17:14:57 +01:00 committed by Greg Kroah-Hartman
parent 95cfc75234
commit 55eb3c3a63
1 changed files with 1 additions and 0 deletions
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1
drivers/staging/gpib/agilent_82357a/agilent_82357a.c
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@ -1365,6 +1365,7 @@ static int agilent_82357a_attach(gpib_board_t *board, const gpib_board_config_t
break;
default:
dev_err(&usb_dev->dev, "bug, unhandled product_id in switch?\n");
mutex_unlock(&agilent_82357a_hotplug_lock);
return -EIO;
}
#ifdef RESET_USB_CONFIG