To prepare for the following fix, introduce the global flag
p2sb_hidden_by_bios. Check if the BIOS hides the P2SB device and store
the result in the flag. This allows to refer to the check result across
functions.
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
---
drivers/platform/x86/p2sb.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/p2sb.c b/drivers/platform/x86/p2sb.c
index aa34b8a69bc1..273ac90c8fbd 100644
--- a/drivers/platform/x86/p2sb.c
+++ b/drivers/platform/x86/p2sb.c
@@ -42,6 +42,7 @@ struct p2sb_res_cache {
};
static struct p2sb_res_cache p2sb_resources[NR_P2SB_RES_CACHE];
+static bool p2sb_hidden_by_bios;
static void p2sb_get_devfn(unsigned int *devfn)
{
@@ -157,13 +158,14 @@ static int p2sb_cache_resources(void)
* Unhide the P2SB device here, if needed.
*/
pci_bus_read_config_dword(bus, devfn_p2sb, P2SBC, &value);
- if (value & P2SBC_HIDE)
+ p2sb_hidden_by_bios = value & P2SBC_HIDE;
+ if (p2sb_hidden_by_bios)
pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, 0);
ret = p2sb_scan_and_cache(bus, devfn_p2sb);
/* Hide the P2SB device, if it was hidden */
- if (value & P2SBC_HIDE)
+ if (p2sb_hidden_by_bios)
pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, P2SBC_HIDE);
pci_unlock_rescan_remove();
--
2.47.0
