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usb: host: max3421-hcd: Correctly abort a USB request.

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commit 0d2ada05227881f3d0722ca2364e3f7a860a301f upstream.

If the current USB request was aborted, the spi thread would not respond
to any further requests. This is because the "curr_urb" pointer would
not become NULL, so no further requests would be taken off the queue.
The solution here is to set the "urb_done" flag, as this will cause the
correct handling of the URB. Also clear interrupts that should only be
expected if an URB is in progress.

Fixes: 2d53139f3162 ("Add support for using a MAX3421E chip as a host driver.")
Cc: stable <stable@kernel.org>
Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20241124221430.1106080-1-mark.tomlinson@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Tomlinson 2024-11-25 11:14:30 +13:00 • committed by Ksawlii
parent b0777ecd9e
commit 73420703cc
1 changed files with 11 additions and 5 deletions

16
drivers/usb/host/max3421-hcd.c
View file

@ -785,11 +785,17 @@ max3421_check_unlink(struct usb_hcd *hcd)
retval = 1;
dev_dbg(&spi->dev, "%s: URB %p unlinked=%d",
__func__, urb, urb->unlinked);
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&max3421_hcd->lock,
flags);
usb_hcd_giveback_urb(hcd, urb, 0);
spin_lock_irqsave(&max3421_hcd->lock, flags);
if (urb == max3421_hcd->curr_urb) {
max3421_hcd->urb_done = 1;
max3421_hcd->hien &= ~(BIT(MAX3421_HI_HXFRDN_BIT) |
BIT(MAX3421_HI_RCVDAV_BIT));
} else {
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&max3421_hcd->lock,
flags);
usb_hcd_giveback_urb(hcd, urb, 0);
spin_lock_irqsave(&max3421_hcd->lock, flags);
}
}
}
}