From fb0fa7643eab9d81626c375a1b3b8d11138dd979 Mon Sep 17 00:00:00 2001 From: Jacob Garber Date: Tue, 30 Apr 2019 17:27:40 -0600 Subject: sb/amd/rs780: Use 32 bit variable to avoid truncation The {read,write}_index functions expect a 32 bit value, as do the bitwise operations. Found-by: Coverity Scan #1229584 Signed-off-by: Jacob Garber Change-Id: Idc2bc46c899d5a4e8b089644dca076a88d97dd7c Reviewed-on: https://review.coreboot.org/c/coreboot/+/32528 Tested-by: build bot (Jenkins) Reviewed-by: HAOUAS Elyes --- src/southbridge/amd/rs780/ht.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'src') diff --git a/src/southbridge/amd/rs780/ht.c b/src/southbridge/amd/rs780/ht.c index 94df2337c1..8943fc1300 100644 --- a/src/southbridge/amd/rs780/ht.c +++ b/src/southbridge/amd/rs780/ht.c @@ -24,24 +24,24 @@ void avoid_lpc_dma_deadlock(struct device *nb_dev, struct device *sb_dev) { struct device *cpu_f0; - u8 reg; + u32 reg32; cpu_f0 = pcidev_on_root(0x18, 0); set_nbcfg_enable_bits(cpu_f0, 0x68, 3 << 21, 1 << 21); - reg = nbpcie_p_read_index(sb_dev, 0x10); - reg |= 0x100; /* bit9=1 */ - nbpcie_p_write_index(sb_dev, 0x10, reg); + reg32 = nbpcie_p_read_index(sb_dev, 0x10); + reg32 |= 0x100; /* bit9=1 */ + nbpcie_p_write_index(sb_dev, 0x10, reg32); - reg = nbpcie_p_read_index(nb_dev, 0x10); - reg |= 0x100; /* bit9=1 */ - nbpcie_p_write_index(nb_dev, 0x10, reg); + reg32 = nbpcie_p_read_index(nb_dev, 0x10); + reg32 |= 0x100; /* bit9=1 */ + nbpcie_p_write_index(nb_dev, 0x10, reg32); /* Enable NP protocol over PCIE for memory-mapped writes targeting LPC * Set this bit to avoid a deadlock condition. */ - reg = htiu_read_index(nb_dev, 0x6); - reg |= 0x1000000; /* bit26 */ - htiu_write_index(nb_dev, 0x6, reg); + reg32 = htiu_read_index(nb_dev, 0x6); + reg32 |= 0x1000000; /* bit26 */ + htiu_write_index(nb_dev, 0x6, reg32); } static void pcie_init(struct device *dev) -- cgit v1.2.3