PCI: designware-ep: Fix find_first_zero_bit() usage

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find_first_zero_bit()'s parameter 'size' is defined in bits,
not in bytes.

find_first_zero_bit() is called with size in bytes rather than bits,
which thus defines a too low upper limit, causing
dw_pcie_ep_inbound_atu() to assign iatu index #4 to both bar 4
and bar 5, which makes bar 5 overwrite the settings set by bar 4.

Since the sizes of the bitmaps are known, dynamically allocate the
bitmaps, and use the correct size when calling find_first_zero_bit().

Additionally, make sure that ep->num_ob_windows and ep->num_ib_windows,
which are obtained from device tree, are smaller than the maximum number
of iATUs (MAX_IATU_IN/MAX_IATU_OUT).

Fixes: f8aed6ec62 ("PCI: dwc: designware: Add EP mode support")
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>

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Niklas Cassel 2017-12-14 14:01:44 +01:00 • committed by Lorenzo Pieralisi

parent 1291a0d504

commit ad4a5becc6

2 changed files with 32 additions and 10 deletions

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34

drivers/pci/dwc/pcie-designware-ep.c

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8

drivers/pci/dwc/pcie-designware.h

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