misc: rtsx: Fix an error handling path in rtsx_pci_probe()

[ Upstream commit 44fd1917314e9d4f53dd95dd65df1c152f503d3a ]

If an error occurs after a successful idr_alloc() call, the corresponding
resource must be released with idr_remove() as already done in the .remove
function.

Update the error handling path to add the missing idr_remove() call.

Fixes: ada8a8a13b13 ("mfd: Add realtek pcie card reader driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/e8dc41716cbf52fb37a12e70d8972848e69df6d6.1655271216.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index 5121edb..62fdbbd 100644 (file)
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -1581,7 +1581,7 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
        pcr->remap_addr = ioremap(base, len);
        if (!pcr->remap_addr) {
                ret = -ENOMEM;
-               goto free_handle;
+               goto free_idr;
        }
 
        pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
@@ -1651,6 +1651,10 @@ disable_msi:
                        pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
 unmap:
        iounmap(pcr->remap_addr);
+free_idr:
+       spin_lock(&rtsx_pci_lock);
+       idr_remove(&rtsx_pci_idr, pcr->id);
+       spin_unlock(&rtsx_pci_lock);
 free_handle:
        kfree(handle);
 free_pcr: