From: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
commit c370baa328022cbd46c59c821d1b467a97f047be upstream.
On systems without HBM (High Bandwidth Memory) mdev/mbase are not
released/unmapped.
Add the code to release mdev/mbase when failing to detect HBM.
[Tony: re-word commit message]
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: c945088384d0 ("EDAC/i10nm: Add support for high bandwidth memory")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Link: https://lore.kernel.org/r/20211224091126.1246-1-qiuxu.zhuo@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/edac/i10nm_base.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -358,6 +358,9 @@ static int i10nm_get_hbm_munits(void)
mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE);
if (!mbase) {
+ pci_dev_put(d->imc[lmc].mdev);
+ d->imc[lmc].mdev = NULL;
+
i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n",
base + off);
return -ENOMEM;
@@ -368,6 +371,12 @@ static int i10nm_get_hbm_munits(void)
mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0);
if (!I10NM_IS_HBM_IMC(mcmtr)) {
+ iounmap(d->imc[lmc].mbase);
+ d->imc[lmc].mbase = NULL;
+ d->imc[lmc].hbm_mc = false;
+ pci_dev_put(d->imc[lmc].mdev);
+ d->imc[lmc].mdev = NULL;
+
i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n");
return -ENODEV;
}
