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ti: Handle errors from copyin() and copyout()

Browse Source 
This is in preparation for annotating copyin() and related functions
with __result_use_check.

MFC after:	1 week
This commit is contained in:
Mark Johnston 2023-12-26 18:58:24 -05:00
parent 10b84b88f0
commit 916273680b
1 changed files with 33 additions and 23 deletions
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56
sys/dev/ti/if_ti.c
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@ -502,11 +502,13 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
int segptr, segsize, cnt;
caddr_t ptr;
uint32_t origwin;
int resid, segresid;
int error, resid, segresid;
int first_pass;
TI_LOCK_ASSERT(sc);
error = 0;
/*
* At the moment, we don't handle non-aligned cases, we just bail.
* If this proves to be a problem, it will be fixed.
@ -548,7 +550,7 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
*/
origwin = CSR_READ_4(sc, TI_WINBASE);
while (cnt) {
while (cnt != 0 && error == 0) {
bus_size_t ti_offset;
if (cnt < TI_WINLEN)
@ -573,11 +575,13 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
TI_UNLOCK(sc);
if (first_pass) {
copyout(&sc->ti_membuf2[segresid], ptr,
error = copyout(
&sc->ti_membuf2[segresid], ptr,
segsize - segresid);
first_pass = 0;
} else
copyout(sc->ti_membuf2, ptr, segsize);
error = copyout(sc->ti_membuf2, ptr,
segsize);
TI_LOCK(sc);
} else {
if (first_pass) {
@ -597,7 +601,7 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
} else {
if (useraddr) {
TI_UNLOCK(sc);
copyin(ptr, sc->ti_membuf2, segsize);
error = copyin(ptr, sc->ti_membuf2, segsize);
TI_LOCK(sc);
ti_bcopy_swap(sc->ti_membuf2, sc->ti_membuf,
segsize, TI_SWAP_HTON);
@ -605,8 +609,11 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
ti_bcopy_swap(ptr, sc->ti_membuf, segsize,
TI_SWAP_HTON);
bus_space_write_region_4(sc->ti_btag, sc->ti_bhandle,
ti_offset, (uint32_t *)sc->ti_membuf, segsize >> 2);
if (error == 0) {
bus_space_write_region_4(sc->ti_btag,
sc->ti_bhandle, ti_offset,
(uint32_t *)sc->ti_membuf, segsize >> 2);
}
}
segptr += segsize;
ptr += segsize;
@ -616,7 +623,7 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
/*
* Handle leftover, non-word-aligned bytes.
*/
if (resid != 0) {
if (resid != 0 && error == 0) {
uint32_t tmpval, tmpval2;
bus_size_t ti_offset;
@ -649,7 +656,7 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
*/
if (useraddr) {
TI_UNLOCK(sc);
copyout(&tmpval2, ptr, resid);
error = copyout(&tmpval2, ptr, resid);
TI_LOCK(sc);
} else
bcopy(&tmpval2, ptr, resid);
@ -667,21 +674,22 @@ ti_copy_mem(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
*/
if (useraddr) {
TI_UNLOCK(sc);
copyin(ptr, &tmpval2, resid);
error = copyin(ptr, &tmpval2, resid);
TI_LOCK(sc);
} else
bcopy(ptr, &tmpval2, resid);
tmpval = htonl(tmpval2);
bus_space_write_region_4(sc->ti_btag, sc->ti_bhandle,
ti_offset, &tmpval, 1);
if (error == 0) {
tmpval = htonl(tmpval2);
bus_space_write_region_4(sc->ti_btag,
sc->ti_bhandle, ti_offset, &tmpval, 1);
}
}
}
CSR_WRITE_4(sc, TI_WINBASE, origwin);
return (0);
return (error);
}
static int
@ -689,7 +697,7 @@ ti_copy_scratch(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
caddr_t buf, int useraddr, int readdata, int cpu)
{
uint32_t segptr;
int cnt;
int cnt, error;
uint32_t tmpval, tmpval2;
caddr_t ptr;
@ -715,7 +723,7 @@ ti_copy_scratch(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
cnt = len;
ptr = buf;
while (cnt) {
while (cnt && error == 0) {
CSR_WRITE_4(sc, CPU_REG(TI_SRAM_ADDR, cpu), segptr);
if (readdata) {
@ -756,18 +764,20 @@ ti_copy_scratch(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
"%#x (tmpval)\n", segptr);
if (useraddr)
copyout(&tmpval, ptr, 4);
error = copyout(&tmpval, ptr, 4);
else
bcopy(&tmpval, ptr, 4);
} else {
if (useraddr)
copyin(ptr, &tmpval2, 4);
error = copyin(ptr, &tmpval2, 4);
else
bcopy(ptr, &tmpval2, 4);
tmpval = htonl(tmpval2);
CSR_WRITE_4(sc, CPU_REG(TI_SRAM_DATA, cpu), tmpval);
if (error == 0) {
tmpval = htonl(tmpval2);
CSR_WRITE_4(sc, CPU_REG(TI_SRAM_DATA, cpu),
tmpval);
}
}
cnt -= 4;
@ -775,7 +785,7 @@ ti_copy_scratch(struct ti_softc *sc, uint32_t tigon_addr, uint32_t len,
ptr += 4;
}
return (0);
return (error);
}
static int