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Disable DMA channels when resetting ISAPnP logical devices

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This commit is contained in:
RichardG867
2021-03-20 14:54:34 -03:00
parent c6bbfd296c
commit 966ddba554
1 changed files with 13 additions and 1 deletions
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14
src/device/isapnp.c
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@@ -157,6 +157,16 @@ isapnp_device_config_changed(isapnp_t *dev)
} }
static void
isapnp_reset_ld_regs(isapnp_device_t *ld)
{
memset(ld->regs, 0, sizeof(ld->regs));
/* DMA disable uses a non-zero value. */
ld->regs[0x74] = ld->regs[0x75] = ISAPNP_DMA_DISABLED;
}
static uint8_t static uint8_t
isapnp_read_rangecheck(uint16_t addr, void *priv) isapnp_read_rangecheck(uint16_t addr, void *priv)
{ {
@@ -356,9 +366,9 @@ isapnp_write_data(uint16_t addr, uint8_t val, void *priv)
while (card) { while (card) {
ld = card->first_ld; ld = card->first_ld;
while (ld) { while (ld) {
memset(ld->regs, 0, sizeof(ld->regs));
dev->current_ld = ld; dev->current_ld = ld;
dev->current_ld_card = card; dev->current_ld_card = card;
isapnp_reset_ld_regs(ld);
isapnp_device_config_changed(dev); isapnp_device_config_changed(dev);
ld = ld->next; ld = ld->next;
} }
@@ -443,6 +453,8 @@ isapnp_write_data(uint16_t addr, uint8_t val, void *priv)
dev->current_ld_card = card; dev->current_ld_card = card;
dev->current_ld = ld; dev->current_ld = ld;
isapnp_reset_ld_regs(ld);
/* Logical device just created, no need to signal a change. */
if (!card->first_ld) { if (!card->first_ld) {
card->first_ld = ld; card->first_ld = ld;