From: Qiuxu Zhuo qiuxu.zhuo@intel.com
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@vger.kernel.org Fixes: c945088384d0 ("EDAC/i10nm: Add support for high bandwidth memory") Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Qiuxu Zhuo qiuxu.zhuo@intel.com Signed-off-by: Tony Luck tony.luck@intel.com Link: https://lore.kernel.org/r/20211224091126.1246-1-qiuxu.zhuo@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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; }