USB: serial: mos7840: fix probe error handling

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The driver would return success and leave the port structures
half-initialised if any of the register accesses during probe fails.

This would specifically leave the port control urb unallocated,
something which could trigger a NULL pointer dereference on interrupt
events.

Fortunately the interrupt implementation is completely broken and has
never even been enabled...

Note that the zero-length-enable register write used to set the zle-flag
for all ports is moved to attach.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

...

This commit is contained in:

Johan Hovold 2019-11-07 14:28:56 +01:00

parent 1c333550ea

commit 960fbd1ca5

1 changed files with 28 additions and 20 deletions

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48

drivers/usb/serial/mos7840.c

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