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| author | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2020-09-19 15:24:35 +0200 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-10-08 15:24:32 +0100 |
| commit | 1cb169b27a7e78176de2101ce7c0a577945c8dec (patch) | |
| tree | bd29a5f8f6e189920e0282a17a0be289fb3e7e89 /hw/ssi | |
| parent | 6eeea6725a70e6fcb5abba0764496bdab07ddfb3 (diff) | |
hw/ssi/npcm7xx_fiu: Fix handling of unsigned integer
Fix integer handling issues handling issue reported by Coverity:
hw/ssi/npcm7xx_fiu.c: 162 in npcm7xx_fiu_flash_read()
>>> CID 1432730: Integer handling issues (NEGATIVE_RETURNS)
>>> "npcm7xx_fiu_cs_index(fiu, f)" is passed to a parameter that cannot be negative.
162 npcm7xx_fiu_select(fiu, npcm7xx_fiu_cs_index(fiu, f));
hw/ssi/npcm7xx_fiu.c: 221 in npcm7xx_fiu_flash_write()
218 cs_id = npcm7xx_fiu_cs_index(fiu, f);
219 trace_npcm7xx_fiu_flash_write(DEVICE(fiu)->canonical_path, cs_id, addr,
220 size, v);
>>> CID 1432729: Integer handling issues (NEGATIVE_RETURNS)
>>> "cs_id" is passed to a parameter that cannot be negative.
221 npcm7xx_fiu_select(fiu, cs_id);
Since the index of the flash can not be negative, return an
unsigned type.
Reported-by: Coverity (CID 1432729 & 1432730: NEGATIVE_RETURNS)
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Havard Skinnemoen <hskinnemoen@google.com>
Message-id: 20200919132435.310527-1-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/ssi')
| -rw-r--r-- | hw/ssi/npcm7xx_fiu.c | 12 | ||||
| -rw-r--r-- | hw/ssi/trace-events | 2 |
2 files changed, 7 insertions, 7 deletions
diff --git a/hw/ssi/npcm7xx_fiu.c b/hw/ssi/npcm7xx_fiu.c index 104e8f2b96..5040132b07 100644 --- a/hw/ssi/npcm7xx_fiu.c +++ b/hw/ssi/npcm7xx_fiu.c @@ -103,7 +103,8 @@ enum NPCM7xxFIURegister { * Returns the index of flash in the fiu->flash array. This corresponds to the * chip select ID of the flash. */ -static int npcm7xx_fiu_cs_index(NPCM7xxFIUState *fiu, NPCM7xxFIUFlash *flash) +static unsigned npcm7xx_fiu_cs_index(NPCM7xxFIUState *fiu, + NPCM7xxFIUFlash *flash) { int index = flash - fiu->flash; @@ -113,20 +114,19 @@ static int npcm7xx_fiu_cs_index(NPCM7xxFIUState *fiu, NPCM7xxFIUFlash *flash) } /* Assert the chip select specified in the UMA Control/Status Register. */ -static void npcm7xx_fiu_select(NPCM7xxFIUState *s, int cs_id) +static void npcm7xx_fiu_select(NPCM7xxFIUState *s, unsigned cs_id) { trace_npcm7xx_fiu_select(DEVICE(s)->canonical_path, cs_id); if (cs_id < s->cs_count) { qemu_irq_lower(s->cs_lines[cs_id]); + s->active_cs = cs_id; } else { qemu_log_mask(LOG_GUEST_ERROR, "%s: UMA to CS%d; this module has only %d chip selects", DEVICE(s)->canonical_path, cs_id, s->cs_count); - cs_id = -1; + s->active_cs = -1; } - - s->active_cs = cs_id; } /* Deassert the currently active chip select. */ @@ -206,7 +206,7 @@ static void npcm7xx_fiu_flash_write(void *opaque, hwaddr addr, uint64_t v, NPCM7xxFIUFlash *f = opaque; NPCM7xxFIUState *fiu = f->fiu; uint32_t dwr_cfg; - int cs_id; + unsigned cs_id; int i; if (fiu->active_cs != -1) { diff --git a/hw/ssi/trace-events b/hw/ssi/trace-events index 2f83ef833f..612d3d6087 100644 --- a/hw/ssi/trace-events +++ b/hw/ssi/trace-events @@ -19,4 +19,4 @@ npcm7xx_fiu_deselect(const char *id, int cs) "%s deselect CS%d" npcm7xx_fiu_ctrl_read(const char *id, uint64_t addr, uint32_t data) "%s offset: 0x%04" PRIx64 " value: 0x%08" PRIx32 npcm7xx_fiu_ctrl_write(const char *id, uint64_t addr, uint32_t data) "%s offset: 0x%04" PRIx64 " value: 0x%08" PRIx32 npcm7xx_fiu_flash_read(const char *id, int cs, uint64_t addr, unsigned int size, uint64_t value) "%s[%d] offset: 0x%08" PRIx64 " size: %u value: 0x%" PRIx64 -npcm7xx_fiu_flash_write(const char *id, int cs, uint64_t addr, unsigned int size, uint64_t value) "%s[%d] offset: 0x%08" PRIx64 " size: %u value: 0x%" PRIx64 +npcm7xx_fiu_flash_write(const char *id, unsigned cs, uint64_t addr, unsigned int size, uint64_t value) "%s[%d] offset: 0x%08" PRIx64 " size: %u value: 0x%" PRIx64 |