4.9-stable review patch. If anyone has any objections, please let me know.
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From: Boris Brezillon boris.brezillon@free-electrons.com
[ Upstream commit 4d02423e9afe6c46142ce98bbcaf5167316dbfbf ]
The GPMI driver is wrongly assuming that nand_release() can safely be called on an uninitialized/unregistered NAND device.
Add a new err_nand_cleanup label in the error path and only execute if nand_scan_tail() succeeded.
Note that we now call nand_cleanup() instead of nand_release() (nand_release() is actually grouping the mtd_device_unregister() and nand_cleanup() in one call) because there's no point in trying to unregister a device that has never been registered.
Signed-off-by: Boris Brezillon boris.brezillon@free-electrons.com Reviewed-by: Marek Vasut marek.vasut@gmail.com Acked-by: Han Xu han.xu@nxp.com Reviewed-by: Marek Vasut marek.vasut@gmail.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c @@ -2047,18 +2047,20 @@ static int gpmi_nand_init(struct gpmi_na
ret = nand_boot_init(this); if (ret) - goto err_out; + goto err_nand_cleanup; ret = chip->scan_bbt(mtd); if (ret) - goto err_out; + goto err_nand_cleanup;
ret = mtd_device_register(mtd, NULL, 0); if (ret) - goto err_out; + goto err_nand_cleanup; return 0;
+err_nand_cleanup: + nand_cleanup(chip); err_out: - gpmi_nand_exit(this); + gpmi_free_dma_buffer(this); return ret; }