diff options
Diffstat (limited to 'hw/ssi/xilinx_spips.c')
| -rw-r--r-- | hw/ssi/xilinx_spips.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c index 85c5d0cb92..8af36ca3d4 100644 --- a/hw/ssi/xilinx_spips.c +++ b/hw/ssi/xilinx_spips.c @@ -210,6 +210,9 @@ #define SNOOP_NONE 0xEE #define SNOOP_STRIPING 0 +#define MIN_NUM_BUSSES 1 +#define MAX_NUM_BUSSES 2 + static inline int num_effective_busses(XilinxSPIPS *s) { return (s->regs[R_LQSPI_CFG] & LQSPI_CFG_SEP_BUS && @@ -573,7 +576,7 @@ static void xilinx_spips_flush_txfifo(XilinxSPIPS *s) for (;;) { int i; uint8_t tx = 0; - uint8_t tx_rx[num_effective_busses(s)]; + uint8_t tx_rx[MAX_NUM_BUSSES] = { 0 }; uint8_t dummy_cycles = 0; uint8_t addr_length; @@ -1221,6 +1224,19 @@ static void xilinx_spips_realize(DeviceState *dev, Error **errp) DB_PRINT_L(0, "realized spips\n"); + if (s->num_busses > MAX_NUM_BUSSES) { + error_setg(errp, + "requested number of SPI busses %u exceeds maximum %d", + s->num_busses, MAX_NUM_BUSSES); + return; + } + if (s->num_busses < MIN_NUM_BUSSES) { + error_setg(errp, + "requested number of SPI busses %u is below minimum %d", + s->num_busses, MIN_NUM_BUSSES); + return; + } + s->spi = g_new(SSIBus *, s->num_busses); for (i = 0; i < s->num_busses; ++i) { char bus_name[16]; |