4.19-stable review patch. If anyone has any objections, please let me know.
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From: RodrÃguez Barbarin, José Javier JoseJavier.Rodriguez@duagon.com
[ Upstream commit a889c276d33d333ae96697510f33533f6e9d9591 ]
The function chameleon_parse_cells() returns the number of cells parsed which has an undetermined size. This return value is only used for error checking but the number of cells is never used.
Change return value to be number of bytes parsed to allow for memory management improvements.
Co-developed-by: Jorge Sanjuan Garcia jorge.sanjuangarcia@duagon.com Signed-off-by: Jorge Sanjuan Garcia jorge.sanjuangarcia@duagon.com Signed-off-by: Javier Rodriguez josejavier.rodriguez@duagon.com Signed-off-by: Johannes Thumshirn jth@kernel.org Link: https://lore.kernel.org/r/20230411083329.4506-2-jth@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mcb/mcb-parse.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/mcb/mcb-parse.c b/drivers/mcb/mcb-parse.c index 08a85e43ef885..b7354232221e6 100644 --- a/drivers/mcb/mcb-parse.c +++ b/drivers/mcb/mcb-parse.c @@ -127,7 +127,7 @@ static void chameleon_parse_bar(void __iomem *base, } }
-static int chameleon_get_bar(char __iomem **base, phys_addr_t mapbase, +static int chameleon_get_bar(void __iomem **base, phys_addr_t mapbase, struct chameleon_bar **cb) { struct chameleon_bar *c; @@ -176,12 +176,13 @@ int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase, { struct chameleon_fpga_header *header; struct chameleon_bar *cb; - char __iomem *p = base; + void __iomem *p = base; int num_cells = 0; uint32_t dtype; int bar_count; int ret; u32 hsize; + u32 table_size;
hsize = sizeof(struct chameleon_fpga_header);
@@ -236,12 +237,16 @@ int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase, num_cells++; }
- if (num_cells == 0) - num_cells = -EINVAL; + if (num_cells == 0) { + ret = -EINVAL; + goto free_bar; + }
+ table_size = p - base; + pr_debug("%d cell(s) found. Chameleon table size: 0x%04x bytes\n", num_cells, table_size); kfree(cb); kfree(header); - return num_cells; + return table_size;
free_bar: kfree(cb);