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| author | Michael Brown | 2017-09-05 11:48:41 +0200 |
|---|---|---|
| committer | Michael Brown | 2017-09-05 11:48:41 +0200 |
| commit | 3ae70be5bab1f898efcac859b1b8e3418e0f4a4b (patch) | |
| tree | 6e5e6345e79772d3c83c074abbc4f61899d70dd5 /src/drivers | |
| parent | [linux] Impose receive quota on tap driver (diff) | |
| download | ipxe-3ae70be5bab1f898efcac859b1b8e3418e0f4a4b.tar.gz ipxe-3ae70be5bab1f898efcac859b1b8e3418e0f4a4b.tar.xz ipxe-3ae70be5bab1f898efcac859b1b8e3418e0f4a4b.zip | |
[efi] Raise TPL when calling UNDI entry point
The SnpDxe driver raises the task priority level to TPL_CALLBACK when
calling the UNDI entry point. This does not appear to be a documented
requirement, but we should probably match the behaviour of SnpDxe to
minimise surprises to third party code.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/net/efi/nii.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/drivers/net/efi/nii.c b/src/drivers/net/efi/nii.c index 1c6980e6..1700b4bd 100644 --- a/src/drivers/net/efi/nii.c +++ b/src/drivers/net/efi/nii.c @@ -402,7 +402,9 @@ static EFIAPI VOID nii_block ( UINT64 unique_id, UINT32 acquire ) { */ static int nii_issue_cpb_db ( struct nii_nic *nii, unsigned int op, void *cpb, size_t cpb_len, void *db, size_t db_len ) { + EFI_BOOT_SERVICES *bs = efi_systab->BootServices; PXE_CDB cdb; + UINTN tpl; /* Prepare command descriptor block */ memset ( &cdb, 0, sizeof ( cdb ) ); @@ -414,6 +416,9 @@ static int nii_issue_cpb_db ( struct nii_nic *nii, unsigned int op, void *cpb, cdb.DBsize = db_len; cdb.IFnum = nii->nii->IfNum; + /* Raise task priority level */ + tpl = bs->RaiseTPL ( TPL_CALLBACK ); + /* Issue command */ DBGC2 ( nii, "NII %s issuing %02x:%04x ifnum %d%s%s\n", nii->dev.name, cdb.OpCode, cdb.OpFlags, cdb.IFnum, @@ -424,6 +429,9 @@ static int nii_issue_cpb_db ( struct nii_nic *nii, unsigned int op, void *cpb, DBGC2_HD ( nii, db, db_len ); nii->issue ( ( intptr_t ) &cdb ); + /* Restore task priority level */ + bs->RestoreTPL ( tpl ); + /* Check completion status */ if ( cdb.StatCode != PXE_STATCODE_SUCCESS ) return -cdb.StatCode; |