github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-06-29 00:37:15 +00:00
Code Issues Projects Releases Wiki Activity

dm: Fix uninitialized variable in AHCI

Browse Source 
tfd is one data field of FIS for AHCI, it is unacceptable if it is
random value, could cause AHCI data transport failure.

Acturally there is no chance the switch statement has the value other
than 0~3, since there is only 2 bit to deduce.

Add the initial value for tfd as ATA_S_ERROR, which is checked by
function ahci_write_fis_d2h afterwards, so guest driver could handle it well.

Tracked-On: #7679

Signed-off-by: hangliu1 <hang1.liu@linux.intel.com>
This commit is contained in:
hangliu1 2022-06-03 23:24:35 +08:00 committed by acrnsi-robot
parent e89ca5361a
commit 74c22f5382
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
devicemodel/hw/pci/ahci.c
View File

@ -1468,7 +1468,7 @@ static void
atapi_start_stop_unit(struct ahci_port *p, int slot, uint8_t *cfis)
{
uint8_t *acmd = cfis + 0x40;
uint32_t tfd;
uint32_t tfd = ATA_S_ERROR;
switch (acmd[4] & 3) {
case 0: