From: Finn Thain Date: Wed, 29 Jan 2020 09:27:49 +0000 (+1100) Subject: dp8393x: Don't reset Silicon Revision register X-Git-Tag: v5.0.0-rc0~61^2~10 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=083e21bbdde7dbd326baf29d21f49fc3f5614496;p=users%2Fdwmw2%2Fqemu.git dp8393x: Don't reset Silicon Revision register The jazzsonic driver in Linux uses the Silicon Revision register value to probe the chip. The driver fails unless the SR register contains 4. Unfortunately, reading this register in QEMU usually returns 0 because the s->regs[] array gets wiped after a software reset. Fixes: bd8f1ebce4 ("net/dp8393x: fix hardware reset") Suggested-by: Philippe Mathieu-Daudé Signed-off-by: Finn Thain Signed-off-by: Jason Wang --- diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c index cfbc2ee552..c2ac2a110e 100644 --- a/hw/net/dp8393x.c +++ b/hw/net/dp8393x.c @@ -923,6 +923,7 @@ static void dp8393x_reset(DeviceState *dev) timer_del(s->watchdog); memset(s->regs, 0, sizeof(s->regs)); + s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux/mips */ s->regs[SONIC_CR] = SONIC_CR_RST | SONIC_CR_STP | SONIC_CR_RXDIS; s->regs[SONIC_DCR] &= ~(SONIC_DCR_EXBUS | SONIC_DCR_LBR); s->regs[SONIC_RCR] &= ~(SONIC_RCR_LB0 | SONIC_RCR_LB1 | SONIC_RCR_BRD | SONIC_RCR_RNT); @@ -975,7 +976,6 @@ static void dp8393x_realize(DeviceState *dev, Error **errp) qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); s->watchdog = timer_new_ns(QEMU_CLOCK_VIRTUAL, dp8393x_watchdog, s); - s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux */ memory_region_init_ram(&s->prom, OBJECT(dev), "dp8393x-prom", SONIC_PROM_SIZE, &local_err);