On 2/17/22 3:12 PM, Dan Carpenter wrote: > url: https://github.com/0day-ci/linux/commits/Sergey-Shtylyov/Refactor-the-accessors-for-the-ATA-device-control-and-alternate-status-registers/20220213-231119 > base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b81b1829e7e39f6cebdf6e4d5484eacbceda8554 > config: riscv-randconfig-m031-20220213 (https://download.01.org/0day-ci/archive/20220214/202202141714.X7UdMJUj-lkp@xxxxxxxxx/config) > compiler: riscv32-linux-gcc (GCC) 11.2.0 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > > smatch warnings: > drivers/ata/libata-sff.c:1652 ata_sff_lost_interrupt() error: uninitialized symbol 'status'. > > vim +/status +1652 drivers/ata/libata-sff.c > > c96f1732e25362 Alan Cox 2009-03-24 1635 void ata_sff_lost_interrupt(struct ata_port *ap) > c96f1732e25362 Alan Cox 2009-03-24 1636 { > c96f1732e25362 Alan Cox 2009-03-24 1637 u8 status; > c96f1732e25362 Alan Cox 2009-03-24 1638 struct ata_queued_cmd *qc; > c96f1732e25362 Alan Cox 2009-03-24 1639 > c96f1732e25362 Alan Cox 2009-03-24 1640 /* Only one outstanding command per SFF channel */ > c96f1732e25362 Alan Cox 2009-03-24 1641 qc = ata_qc_from_tag(ap, ap->link.active_tag); > 3e4ec3443f70fb Tejun Heo 2010-05-10 1642 /* We cannot lose an interrupt on a non-existent or polled command */ > 3e4ec3443f70fb Tejun Heo 2010-05-10 1643 if (!qc || qc->tf.flags & ATA_TFLAG_POLLING) > c96f1732e25362 Alan Cox 2009-03-24 1644 return; > c96f1732e25362 Alan Cox 2009-03-24 1645 /* See if the controller thinks it is still busy - if so the command > c96f1732e25362 Alan Cox 2009-03-24 1646 isn't a lost IRQ but is still in progress */ > 57232468aca7de Sergey Shtylyov 2022-02-13 1647 if (ata_sff_altstatus(ap, &status) && (status & ATA_BUSY)) > > "status" is not intialized if ata_sff_altstatus() return false. Hmm, inaccurate coding on my side, will fix it, thanks! > c96f1732e25362 Alan Cox 2009-03-24 1648 return; > c96f1732e25362 Alan Cox 2009-03-24 1649 > c96f1732e25362 Alan Cox 2009-03-24 1650 /* There was a command running, we are no longer busy and we have > c96f1732e25362 Alan Cox 2009-03-24 1651 no interrupt. */ > a9a79dfec23956 Joe Perches 2011-04-15 @1652 ata_port_warn(ap, "lost interrupt (Status 0x%x)\n", > c96f1732e25362 Alan Cox 2009-03-24 1653 status); > ^^^^^^ > Uninitalized. Also the indenting is unfortunate. Not my fault but I'll fix this as well... :-) [...] MBR, Sergey
