PCI: dwc: ep: Return -ENOMEM for allocation failures

[ Upstream commit 8189aa56dbed0bfb46b7b30d4d231f57ab17b3f4 ]

If the bitmap or memory allocations fail, then dw_pcie_ep_init_registers()
will incorrectly return a success.

Return -ENOMEM instead.

Fixes: 869bc5253406 ("PCI: dwc: ep: Fix DBI access failure for drivers requiring refclk from host")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/36dcb6fc-f292-4dd5-bd45-a8c6f9dc3df7@stanley.mountain
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index b58e89ea566b8d55506a9fdfd6656364f449ce6c..dea19250598a664563b3ebf1c5f100e8176a282a 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -755,6 +755,7 @@ int dw_pcie_ep_init_registers(struct dw_pcie_ep *ep)
        if (ret)
                return ret;
 
+       ret = -ENOMEM;
        if (!ep->ib_window_map) {
                ep->ib_window_map = devm_bitmap_zalloc(dev, pci->num_ib_windows,
                                                       GFP_KERNEL);