[bug report] scsi: megaraid: Pass in NULL scb for host reset

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

Hello Hannes Reinecke,

The patch 5bcd3bfbda02: "scsi: megaraid: Pass in NULL scb for host
reset" from Oct 2, 2023 (linux-next), leads to the following Smatch
static checker warning:

    drivers/scsi/megaraid.c:1901 megaraid_reset()
    error: NULL dereference inside function 'megaraid_abort_and_reset()'

    drivers/scsi/megaraid.c:1940 megaraid_abort_and_reset()
    warn: variable dereferenced before check 'cmd' (see line 1928)

drivers/scsi/megaraid.c
    1899         spin_lock_irq(&adapter->lock);
    1900 
--> 1901         rval =  megaraid_abort_and_reset(adapter, NULL, SCB_RESET);
                                                           ^^^^
The debug code dereferences this unconditionally...

    1902 
    1903         /*
    1904          * This is required here to complete any completed requests
    1905          * to be communicated over to the mid layer.
    1906          */
    1907         mega_rundoneq(adapter);
    1908         spin_unlock_irq(&adapter->lock);
    1909 
    1910         return rval;
    1911 }

regards,
dan carpenter