[PATCH kernel 1/2] crypto/ccp: Use PCI bridge defaults for IDE

Alexey Kardashevskiy
2026-01-23T05:31:49Z

The current number of streams in AMD TSM is 1 which is too little,
the core uses 255. Also, even if the module parameter is increased,
calling pci_ide_set_nr_streams() second time triggers WARN_ON.

Simplify the code by sticking to the PCI core defaults.

Fixes: 4be423572da1 ("crypto/ccp: Implement SEV-TIO PCIe IDE (phase1)")
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
---
drivers/crypto/ccp/sev-dev-tsm.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/drivers/crypto/ccp/sev-dev-tsm.c b/drivers/crypto/ccp/sev-dev-tsm.c
index ea29cd5d0ff9..7407b77c2ef2 100644
--- a/drivers/crypto/ccp/sev-dev-tsm.c
+++ b/drivers/crypto/ccp/sev-dev-tsm.c
@@ -19,12 +19,6 @@

MODULE_IMPORT_NS("PCI_IDE");

-#define TIO_DEFAULT_NR_IDE_STREAMS 1
-
-static uint nr_ide_streams = TIO_DEFAULT_NR_IDE_STREAMS;
-module_param_named(ide_nr, nr_ide_streams, uint, 0644);
-MODULE_PARM_DESC(ide_nr, "Set the maximum number of IDE streams per PHB");
-
#define dev_to_sp(dev) ((struct sp_device *)dev_get_drvdata(dev))
#define dev_to_psp(dev) ((struct psp_device *)(dev_to_sp(dev)->psp_data))
#define dev_to_sev(dev) ((struct sev_device *)(dev_to_psp(dev)->sev_data))
@@ -193,7 +187,6 @@ static void streams_teardown(struct pci_ide **ide)
static int stream_alloc(struct pci_dev *pdev, struct pci_ide **ide,
unsigned int tc)
{
- struct pci_dev *rp = pcie_find_root_port(pdev);
struct pci_ide *ide1;

if (ide[tc]) {
@@ -201,11 +194,6 @@ static int stream_alloc(struct pci_dev *pdev, struct pci_ide **ide,
return -EBUSY;
}

- /* FIXME: find a better way */
- if (nr_ide_streams != TIO_DEFAULT_NR_IDE_STREAMS)
- pci_notice(pdev, "Enable non-default %d streams", nr_ide_streams);
- pci_ide_set_nr_streams(to_pci_host_bridge(rp->bus->bridge), nr_ide_streams);
-
ide1 = pci_ide_stream_alloc(pdev);
if (!ide1)
return -EFAULT;
--
2.52.0